<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>css动画入门</title>
  <link rel="stylesheet" href="css/h3.css">
</head>

<body>

  <span class="ani1">动画效果一</span>

  <!-- 多个过渡动画效果 -->
  <hr>

  <div class="ani2">
    多样式过渡动画
  </div>

</body>

</html>